Material:Iron ; Adjustable length:( 1.06"-4.4" ) At night, are you still bothering you or your family about the shaking of the headboard, or are you still worried that the shaking furniture will hurt your wall? Shaking furniture not only makes noise, but also hurts the furniture body because of the frequent shaking.Our bed frame anti-shake tools are your best choice. Effectively reduce noise and protect the wall from damage, prevent sway, calm your mood and improve your sleep quality.Feature 1. Our threaded slides are screwed into place to transform your bed frame in mins, making your bed more stable. 2. This adjustable threaded bed frame anti-shake tool can be used on beds, cabinets, chairs, sofas and other objects that are used against walls. 3 We recommend using 4 antishake tool on the same plane,Install 2 adjustable bed stabilizer each at the top and bottom of the headboard,First tighten the bottom bed shake stopper against the wall, and then tighten the top headboard stabilizer against the wall.Warm Tip 1.Measure the distance between your shaking furniture and the wall before buying, and then choose the appropriate size. 2.Due to manual measurement, there may be some slight differences, sincerely hope you can understand! Thank you!HEADBOARD STOPPERS FULLY BUNDLED PACKAGE INCLUDES: ?? 1 X Antishake tool for bed user instruction ?? 4 X Adjustable bed frame anti-shake tool ?? 4 X Double-sided tape and extra 4 ?? 4 X EVA cushion ?? 12 X Screw